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Spatio-temporal traces left behind by moving individuals are increasingly available. On the one hand, mining this kind of data is expected to produce interesting behavioral knowledge enabling... View More

Spatio-temporal traces left behind by moving individuals are increasingly available. On the one hand, mining this kind of data is expected to produce interesting behavioral knowledge enabling novel classes of mobility applications; but on the other hand, due to the peculiar nature of position data, mining it creates important privacy concerns. Thus, studying privacy preserving data mining methods for mov- ing object data is interesting and challenging. In this paper, we address the problem of hiding sensi- tive trajectory patterns from moving objects databases. The aim is to modify the database such that a given set of sen- sitive trajectory patterns can no longer be extracted, while the others are preserved as much as possible. We provide the formal problem statement and show that it is NP-hard; so we devise heuristics and a polynomial sanitization al- gorithm. We discuss a possible attack to our model, that exploits the knowledge of the underlying road network, and we enhance our model to protect from this kind of attacks. Experimental results show the effectiveness of our proposal.

The concept of Cooperative Work Environment (CWE) is introduced. Three key elements of CWE, inforrration integration, process integration, and organization integration, are analysed. An application framework of CWE is prcoosed and with this framework a CE CWE based on Lotus Notes/Domino and Intel Pr...

Anonymized data publication has received considerable attention from the research community in recent years. For numerical sensitive attributes, most of the existing privacy-preserving data publishing techniques concentrate on microdata with multiple categorical sensitive attributes or only one nume...

The features of electromyographic (EMG) signals were investigated while people walking on different terrains, including up and down slopes, up and down stairs, and during level walking at different speeds. The features were used to develop a terrain identification method. The technology can be used ...